Add revenue dispute guard

[2bf]

Summary

• Adds a self-contained revenue dispute and adjustment guard for issue Revenue Infrastructure #20.
• Scores chargebacks, open disputes, failed payments, past-due invoices, AI compute overages, rapid top-ups, and licensing export privacy risk.
• Emits entitlement decisions, reserve recommendations, revenue adjustments, recovery actions, licensing export holds, and stable audit digests.
• Includes a short MP4 demo artifact at revenue-dispute-guard/demo.mp4.

Validation

• node revenue-dispute-guard/test.js
• node revenue-dispute-guard/demo.js
• ffprobe -v error -show_entries format=duration,size -show_entries stream=width,height,codec_name -of default=noprint_wrappers=1 revenue-dispute-guard/demo.mp4

/claim #20

Built with AI assistance; reviewed and tested before submission.